Azo compounds



Patented Dec. 5, 1944 UNITED STATES-- PATENT OFFICE AZO COMPOUNDS Gordon'F. Frame and Charles F. H. Allen, Roch- "ester, N. Y., assignors to Eastman Kodak Company, Rochester, N. Y., a corporation of New Jersey No Drawing. Application March 14, 1942, Serial No. 434,780

Claims. (01. 260-192) This invention relates to new azo compounds. More particularly it, relates to the monoazo compound having the formula:

group.

An object of our invention is to providenew azo compounds. Another object is to provide a satisfactory process for the preparation of the new azo compounds of our invention. A further object is to prepare azo compounds which can be used to dyewool and silk.

The azo compounds of our invention can be prepared by diazotizing z-aminochrysene, 3- aminopyrene, 4-aminofiuoranthene, and 3-aminoacenaphthene compounds. and coupling the diazonium compounds "obtained with a naphthalene sulfonic acid substituted with at least one member selected from the'group consisting of a hydroxy group and an amino group.

The azo compounds of our invention possess utility for the dyeing of wool and silk. Further, they also possess some utility for the'dyeing of cotton. Depending upon the particular components employed, magenta, red, purple, blue, greenish-blue and brown dyeings can be obtained.

In addition to being: textile dyes, the azo .com-

2-aminochrysene 3-aminopyrenc It a 4 I NHs i-aminofluoranthene In preparing the azo compounds of our invention, the coupling reaction is effected in an alka- The following examples illustrate. the preparation of the azo compounds of our invention. Parts are expressed in parts by Weight.

Example 1 3 parts of 2-aminoehrysene are dissolved in 2'7 parts of concentrated sulfuric acid (Sp. G. 1.84) and the resulting solution is cooled to a temperature of about 10 C. A solution of 0.86 part of sodium nitrite in '27 parts of concentrated sul- 40 furic acid (Sp. G. 1.84). is then added, with stirring, to the dissolved. Z-aminochrysene- While maintaining the reaction mixture in a cooled condition. Stirring is continued for 30 minutes after which the diazotization reaction which takes place is complete. The reaction mixture is poured upon 125 parts of crushed ice and the precipitated chrysene diazonium sulfate is collected on a filter and sucked as free as possible from the acid liquor and then dispersed in 150 parts of ice cold water.

The diazonium mixture prepared as described above is added with stirring to a solution of 4.2 parts of 1-amino-8-hydroxynaphthalene-2,4-die sulfonic acid in 100 part of water containing 3 parts of sodium carbonate at 1015 C. After stirring for 2 hours, the coupling reaction which takes place is complete and the dye compound formed is recovered by precipitating it by the addition of sodium chloride and filtering. The dye compound obtained has the formula:

011 IIIHZ and dissolves readily in water with a blue color. It dyes wool and silk blue from an aqueous olution.

Ezrample 2 A solution of 3 parts of 4-aminofluoranthene in 27 parts of concentrated sulfuric acid (Sp. G. 1.84) is diazotized by the addition of nitrosyl sulfuric acid made by adding 0.98 part of sodium nitrite to 22 parts of concentrated sulfuric acid (Sp. G. 1.84). The diazotization is carried out at a temperature of 5-10 C. and upon its completion, which requires about 30 minutes, the reaction mixture is poured upon 100 parts of ice and the fiuoranthene diazonium sulfate which precipitates as a greenish-yellow solid is collected and pressed dry.

The diazonium compound prepared as described above is dispersed in 150 parts of ice cold water and added to a solution of 4.8 parts of 1-amino-8-hydroxy naphthalene 2,4 disulfonic acid in 150 parts of water containing 3.5 parts of sodium carbonate. The reaction mixture is maintained at -15 C. and, after stirring for about 2 hours at this temperature, the coupling reaction which takes place is complete and the dye compound formed is precipitated by adding sodium chloride and then recovered by filtering the reaction mixture. The dye compound obtained has the formula:

OH bllHa and dissolves readily in water with a blue color. It dyes wool and silk blue from its aqueous solutidn.

Example 3 3 parts of B-aminoacenaphthene are dissolved in 27 parts of concentrated sulfuric acid (Sp. G. 1.84) and the resulting solution is diazotized at a temperature of 10-15" C. by adding, with stirring, a solution of 1.26 parts of sodium nitrite dissolved in 27 parts of concentrated sulfuric acid (Sp. G. 1.84). After stirring for 30 minutes, the reaction mixture is poured upon parts of ice and the precipitated acenaphthene diazonium sulfate is recovered by filtration, and pressed dry.

The diazonium mixture obtained as described above is dispersed in parts of ice cold water and then added to a solution of 6.1 parts of 1- amino-8-hydroxynaphthalene-3,6-disulfonic acid in 150 parts of water containing 3.5 parts of sodium carbonate. The reaction mixture is stirred for about 2 hours at 10-15 C. following which the coupling reaction which takes place is complete and the dye compound formed is precipitated by adding sodium chloride to the reaction mixture and recovered by filtering. The dye compound obtained has the formula:

N =N NH:

and dissolves readily in water with a magenta color. It dyes wool and silk magenta from its aqueous solution.

Example 1 part of 3-aminopyrene dissolved in 125 parts of water and 25 parts of hydrochloric acid (Sp. G. 1.18) is diazotized at a temperature of 510 C. by adding, with stirring, a solution of 0.33 part of sodium nitrite. After stirring for 10 minutes, a clear solution results and this solution is added to a solution of 1.4 parts of l-phenylaminonaphthalene-B-sulfonic acid in 100 parts of Water and 2 parts of hydrochloric acid (Sp. G. 1.18). After stirring the reaction mixture for 8 hours at room temperature, the coupling reaction which takes place is complete and the insoluble dye formed is colored by filtering the reaction mixture. The dye compound obtained is brown in color and has the formula:

It is only very slightly soluble in water. It colors wool and silk brown from its aqueous dispersion in water. 1

The following tabulation further illustrates the compounds included within the scope of our invention together with the color they produce on wool and silk from their water solutions or their iami nol 8ebIiQmOchrysene-,'.' x2l-samino-a-carboxychr y sene; '3eaminoed-ichloropymene, :3:-amino-i10- chloropyrene,- r-3 ami-r:ro=8.-acetylaminopynene, :3- amino--a/cetylaminopyrene, 3-amino-8-carboxylipyrene, B anfrinorll carbaxylpyrene, .3-amino-8-acety1pyrene, 3-amino-l0-acetylpyrene, and the Z-aminodinitropyrenes such as are disclosed in dispersions: in water. The compoundsindicated below may be prepared by diazotizing the amines listed under the heading Aminefland coupling the diazonium compounds obtained with the compounds specified in the columnenti-tled Coupling -3 component. The diazotization, coupling and recovery reactions may be carried out as indicated herembefore. :Paitent :No. '2,253,555,-1ssued August26, 1941.

Amine Coupling component Color 3-aminopyrene l-naphtho1-4-sulfonic acid .Red.

Do .2-naphthol-7-sulfonie acid Purple. l,S-dihydroxynaphthalene-Ii,6-disulfonic acid Do;

2maphthol;-6;sulfonic acid Red.

2-naphthol-3,6-disulf0nic acid. Reddish-purple. l-naphthol-Bfi-disulfonic acid--. Red. 2-amino-8-naphthol-G-sulionic acid .Reddish-purple;

. e-acid.. Purple.

2an1ino-8'napl thcl'3,6disulfonic acid Red. l-amino-S-naphthol-3;6 disu1fonic acid "Blue. 2-amino-5-naphthol-7-sulf0nic acid RBddiShrDllDPlU. l-amino-8-naphthol-2,4-disulfonic acid. Purple. l-benzoylamino-8-naphtho1-3,6-disulfonic acid Blue.

l-chloro-8-naphthol-3,(idisulfonic acid Purple.

' l-benzoylamino-S-naphthol-3,6-disulfonic acid- Do.

I l-arnino-8-naphthol-3,6-disu1fonic acid Do.

- I-ILHPhthOI-fl-Slllfollic acid Magenta.

. 2-am ino.-5'-naphthol-7-sulfonic acid-.. Do.

2-arnino,-8-naphthol-3,fi-disulionic aci Red. 2-naphthol-7-sulfonic acid Do. zanaphthylamine-l-sulfonic acid Purple.

' 2'naplithol-3,6-disulfonic acid--. Magenta.

I l-naphthol-B,fi-disulfonic acid. Red.

--2-naphthol-6-sulfonic acid- 1-arnino8 naphthol-4-sulfonic Purple.

. 1;8-dihydroxynaphthalene-3,6-disu Do.

.lrplieuylaminonaphthalene-8-sulionic acid. Green.

.- i e-acid. Bright red 2-amino-8-naphthol-fi-sulfonic acid... (1. l-amino-S-naphthol-Z,4-disulfonic acid. Purple. e-acid Red. 2-arnino-5 -naphth ol-7-sulfonic acid Do. 1-benzoylamino-8-naphthol-3,6-disulfonic acid. Purple. 2-naphthol-3,G-disulfonic acid Magenta Z-amino-S-naphthol-3,6-disulfonic acid. Red. l-naphthol-3,6-disulfonic acid 0- l-naphthol-4-sulfonic acid. D0. 2-naphthol-6-sulfonic aci Do. 2-naphthol-7-sulfonic acid Do; 2-11aphthylamine-l-sulfonic acid Do. Z-amino-S-naphthol-G-sulfonic ac1d Do. 1,S-dihydroxynaphthalene-Ii,(i-disulfonic acid Do. 2-naphthol-7-sulfonic acid Purple. 1-naphthol-4-sulionic acid Red. 2-naphthol-6-sulfonic acid. Do. 2-naphthylamine-l-sulfonic ac1d. Do. 1-amino-8-naphthol-3,6-disulfonic acid- Purple. 2-aminc-8-naphthol-6-sulfonic acid ed. 1,8-dihydroxynaphthalenc-3,6-disulfonic acid Do. 2-amino-8-naphthol-3,6-disulfonic acid Do. e-acid Do. l-phenylaminonaphthalene-8-sulfonic acid. Green. Z-amin0-5-naphthol-7-sulfonic acid ed. 1-benzoylaminc-S-naphthol-3,6-disulfonic acid. Purple.

Additional coupling components that can be used in the preparation of the azo compounds of our invention include 1,T-dihydroxynaphthalene- 3,6-disulfonic acid, Z-naphthyZamine-G,8-disulfonic acid, 2-naphthylamine-3,6-disulfonic acid, 2-naphthol-8-sulfonic acid, Z-naphthylamine-G- sulfonic acid, 1-naphthylamine-5-su1fonic acid, 1-naphthylamine-7-sulionic acid, 2-naphtho1-7- sulfonic acid, 1-naphthylamine-4,7-disulfonic acid, 1-amino-8-naphthol-4,6-disulfonic acid, 1- naphthylamine-3,6,8-trisu1fonic acid, Z-phenylamino-8-naphthol-6-sulfonic acid, 1,3-dihydroxynaphthalene-5,7-disulfonic acid. l-methylaminonaphthalene-iB-sulfonic acid, 2-methy1amino-8- naphthol-G-sulfonic acid, l-chloro-8-hydroxynaphthalene-3,6-disulfonic acid, l-benzoylamino- S-hychoxynaphthalene-S.fi-disulfoni-c acid and 2- amino-8-hydroxynaphthalene-6sulfonic acid.

The amine compounds from which the diazonium compounds used in the preparation of the azo dye compounds of our invention are obtained may be substituted with substituents such as a nitro group, a halogen atom, an alkoxy group or a. carboxyl group. Illustrative of these amine compounds are 2-amino-8-chlorochrysene, 2-

The examples given are intended to be illustrative and not limitative of our invention as any of the Z-aminochrysene, 3-aminopyrene, 4-aminofiuoranthene and 3-aminoacenaphthene compounds described or indicated herein can be diazotized and the diazonium compound obtained coupled with any of the coupling compounds indicated herein to obtain dye compounds of our invention whichcolor W001 and silk the same or generally similar colors a the dye compounds specifically indicated.

No special methods are required for applying the azo compounds of our invention to wool and silk, since they can be applied to these materials by methods well known to the art. They can, for example, be directly applied to W001 and silk from their solutions or dispersions in Water. Many of the compounds are sufficiently water-soluble as to be directly applied from a water solution. Compounds insoluble or difficultly insoluble in water can be advantageously applied in conjunction with a solubilizing or dispersing agent such as sulfonated castor oil or sodium lignin sulfonate. Temperatures of 80-90 C. can be employed during the dyeing operation. Practically wherein RN=N- stands for the residue of a diazotized 4-amino-fluoranthene and R1 stands for a naphthalene disulfonic acid substituted with at least one member selected fromthe group consisting of a hydroxy group and an amino group. 3. The azo compound having the formula:

OH NH:

HOrS SO:H

4. The azo compound having the formula;

5. The azo compound having the formula:

(i)H NH:

GORDON F. FRAME. CHARLES F. H. ALLEN. 

